C#操作excel(多种方法比较)
我们在做excel资料的时候，通常有以下方法。
一.导入导出excel常用方法：
1.用查询表的方式查询并show在数据集控件上。
代码
public static string strCon = " Provider = Microsoft.Jet.OLEDB.4.0 ; Data Source =C:\\08.xls;Extended Properties=Excel 8.0";
public static DataSet ds;
protected void Page_Load(object sender, EventArgs e)
{
OleDbConnection conn = new OleDbConnection(strCon);
string sql = "select * from [Sheet1$]";
conn.Open();
OleDbDataAdapter myCommand = new OleDbDataAdapter(sql, strCon);
ds = new DataSet();
myCommand.Fill(ds, "[Sheet1$]");
conn.Close();
datagrid1.DataMember = "[Sheet1$]";
datagrid1.DataSource = ds;
datagrid1.DataBind();
//Excel.Application excel = new Excel.Application();
//excel.Application.Workbooks.Add(true);
//excel.Visible = true;
}
2.一个一个单元格的进行插入
代码
string str = @"Data Source=IT-428E4EA4B0C7\SQLEXPRESS;Initial Catalog=TestBase;Integrated Security=True";
SqlConnection conn = new SqlConnection(str);
conn.Open();
int n = 0;
for (int i = 1; i < 20; i++)
{
if (n > 3)
break;
else
if (msheet.Cells.get_Range("A" + i, Type.Missing).Text.ToString() == "" && n <= 3)
{ n++; }
else
{
//循环获取excel单元格的值一次一次的插入，excuteSql为执行的存储过程
excuteSql(msheet.Cells.get_Range("B" + i, Type.Missing).Text.ToString(),
msheet.Cells.get_Range("B" + (i + 1), Type.Missing).Text.ToString(),
msheet.Cells.get_Range("B" + (i + 2), Type.Missing).Text.ToString(),
conn);
i = i + 3;
}
}
conn.Close();
二快速导入导出
1.我们都知道当向db里批量插入数据的时候我们会选择SqlBulkCopy
if (dataTable!=null && dataTable.Rows.Count!=0)
{
sqlBulkCopy.WriteToServer(dataTable);
}
这个可以看 深山老林新发的一篇SQLServer中批量插入数据方式的性能对比下面是SqlBulkCopy的方法，这个方法有一个弊端就是当excel某一列即有文字，还有日期的时候，会出现null值，我在网上查了一些资料说连接字串加上;HDR=YES;IMEX=1'的时候会都当做字符处理，但是还是会出现一些bug，所以建议最好先把excel数据分析到datatable里然后再用SqlBulkCopy倒入数据库
代码// block copy to DB from Excel //By xijun, //step 1 create an excel file C:\Inetpub\wwwroot\test.xls , fill cell(1,1) with "Data",cell(1,2) with "name" //step 2 create table named "Data" with 2 column ("data","name") in your DB //there the code below: DateTime t1 = DateTime.Now; Response.Write("
start time:" + t1.ToString()); string ExcelFile = @"C:\\20090916_Hub_Report.xls"; string excelConnectionString = @"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + ExcelFile + ";Extended Properties='Excel 8.0;HDR=YES;IMEX=1'"; using (OleDbConnection excelConnection = new OleDbConnection(excelConnectionString)) { excelConnection.Open(); //Getting source data //非空讀入數據 OleDbCommand command = new OleDbCommand("Select [Region],[CustomerPN],[RMA],[Date],[QTY],[Return/Pull] FROM [20090916_Hub_Report$] ", excelConnection); // Initialize SqlBulkCopy object using (OleDbDataReader dr = command.ExecuteReader()) { // Copy data to destination string sqlConnectionString = @"Data Source=MININT-G87PHNA\SQLEXPRESS;Initial Catalog=GDS_Service;Integrated Security=True"; using (SqlBulkCopy bulkCopy = new SqlBulkCopy(sqlConnectionString)) { bulkCopy.DestinationTableName = "GDS_Hub_data"; //加入只加入一個列的話,那么就會其他數據庫列都默認為空。 bulkCopy.ColumnMappings.Add("Region", "region"); bulkCopy.ColumnMappings.Add("CustomerPN", "customer_item_number"); bulkCopy.ColumnMappings.Add("RMA", "Rma"); bulkCopy.ColumnMappings.Add("Date", "date"); bulkCopy.ColumnMappings.Add("QTY", "Qty_1"); bulkCopy.ColumnMappings.Add("Return/Pull", "return_pull"); //bcp.BatchSize = 100;//每次传输的行数 //bcp.NotifyAfter = 100;//进度提示的行数 bulkCopy.BatchSize = 100; bulkCopy.NotifyAfter = 100; bulkCopy.WriteToServer((IDataReader)dr); } } //Closing connection excelConnection.Close(); } DateTime t2 = DateTime.Now; Response.Write("
End time:" + t2.ToString()); Response.Write("
use time:" + ((TimeSpan)(t2 - t1)).Milliseconds.ToString() + " Milliseconds"); Response.Write("
inser record count :3307");
2.快速导出db的数据到excel
这种方法就是利用
Excel.QueryTables
Excel.QueryTable
Querytable把数据快速导入excel里。我们在做复杂报表的时候，这个用的是比较多了，但是单单会这个没有用，它只是快速的把db里的数据放放到excel里，
在做大量数据而且需要设定excel样式的时候我们会选择先用这种方法把数据导入excel一个临时sheet，再利sheet复制，sheet移动，和一些excel样式设定，以及
excel一个强大的自动填充的功能，那么这些就可以让我们快速的做出花样多试的excel报表，当然这个要求我们比较熟练office的操作，包括宏的操作。
代码
public string query_table_getdata(string sourpath)
{
string str_path = sourpath.Substring(0, sourpath.Length - 22);
str_path = str_path + "basic.xls";
Excel.QueryTables m_objQryTables = null;
Excel.QueryTable m_objQryTable = null;
Excel.Application m_objExcel = null;
Excel.Workbooks m_objBooks = null;
Excel.Workbook m_objBook = null;
Excel.Sheets m_objSheets = null;
Excel.Worksheet m_objSheet = null;
Excel.Range m_objRange = null;
m_objExcel = new Excel.Application();
//try
//{
m_objBooks = m_objExcel.Workbooks;
m_objBooks.Open(sourpath, Type.Missing, Type.Missing, Type.Missing, Type.Missing,
Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing);
m_objBook = (Excel.Workbook)m_objBooks.get_Item(1);
m_objSheets = (Excel.Sheets)m_objBook.Worksheets;
m_objSheet = (Excel.Worksheet)m_objSheets.get_Item(1);
m_objRange = m_objSheet.get_Range("A2", Type.Missing);
m_objQryTables = m_objSheet.QueryTables;
string sqlstr = "SELECT [day01],[day02],[day03],[day04],[day05],[day06],[day07],[day08],[day09],[day10],[day11],[day12],[day13],[day14]";
sqlstr += ",[week01] ,[week02],[week03],[week04],[week05],[week06],[week07],[week08],[week09],[week10],[week11],[week12],[week13],[week14]";
sqlstr += ",[week15],[week16],[week17],[week18],[week19],[week20],[week21],[week22],[week23],[week24]";
sqlstr += " FROM [GDS_Service].[dbo].[GDS_Service_Report_Base] order by groupID ,id";
//可以放在配置文件里
string conn = @"Provider=SQLOLEDB.1;Data Source=MININT-G87PHNA\SQLEXPRESS;uid=xijun_ke;Password=12345678; Initial Catalog=GDS_Service;Persist Security Info=False;";
m_objQryTable = (Excel.QueryTable)m_objQryTables.Add("OLEDB;" + conn, m_objRange, sqlstr);
m_objQryTable.RefreshStyle = Excel.XlCellInsertionMode.xlInsertEntireRows;
m_objQryTable.Refresh(false);
m_objBook.SaveAs(str_path, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Excel.XlSaveAsAccessMode.xlExclusive, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing);
m_objBook.Close(false, Type.Missing, Type.Missing);
//}
//catch (Exception ee)
//{
// mp.WriteLog(ee.ToString());
//}
//finally
//{
m_objExcel.Quit();
GC.Collect();
//}
return str_path;
}
